Analytical method: UNKNOWN
| Technique | UNKNOWN |
|---|---|
| Material | WHOLE ROCK |
| Mineral | none |
| Comment | Skyline Labs, Wheatridge, CO |
| Institution | Skyline Labs, Wheat ridge, colorado, USA |
| Reference | John Michael O'Neill (1976) The Geology of the Mt. Richthofen Quadrangle and Adjacent Kawuneechee Valley, Northcentral Colorado. |